package com.ylsf.grk.law_system.interceptor;

import com.ylsf.grk.law_system.context.BaseContext;
import com.ylsf.grk.law_system.property.JwtProperties;
import com.ylsf.grk.law_system.utils.JwtUtil;
import io.jsonwebtoken.Claims;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * @Author 小柯
 * @Date 2024/12/1 22:34
 */
@Component
@Slf4j
@RequiredArgsConstructor
public class JWTEmployeeInterceptor implements HandlerInterceptor {
    private final JwtProperties jwtProperties;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("当前线程的id"+Thread.currentThread().getId());
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getEmployeeTokenName());

        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getEmployeeSecretKey(), token);
            Long empId = Long.valueOf(claims.get("empId").toString());
            log.info("当前员工id：", empId);
            BaseContext.setCurrentId(empId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
